EP1256160B1 - Anker für eine elektrische maschine sowie verfahren zu dessen herstellung - Google Patents

Anker für eine elektrische maschine sowie verfahren zu dessen herstellung Download PDF

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Publication number
EP1256160B1
EP1256160B1 EP01964880A EP01964880A EP1256160B1 EP 1256160 B1 EP1256160 B1 EP 1256160B1 EP 01964880 A EP01964880 A EP 01964880A EP 01964880 A EP01964880 A EP 01964880A EP 1256160 B1 EP1256160 B1 EP 1256160B1
Authority
EP
European Patent Office
Prior art keywords
slot
armature
edge region
groove
deformation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP01964880A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1256160A1 (de
Inventor
Martin Schwerdtle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1256160A1 publication Critical patent/EP1256160A1/de
Application granted granted Critical
Publication of EP1256160B1 publication Critical patent/EP1256160B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/48—Fastening of windings on the stator or rotor structure in slots
    • H02K3/487—Slot-closing devices
    • H02K3/493—Slot-closing devices magnetic
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/0018—Applying slot closure means in the core; Manufacture of slot closure means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49009—Dynamoelectric machine
    • Y10T29/49012—Rotor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49073—Electromagnet, transformer or inductor by assembling coil and core

Definitions

  • the invention relates to an armature for an electrical machine, in particular for an electric starter, according to the preamble of claim 1 and a method for its production according to the preamble of claim 12.
  • Anchors of the type discussed here are known. They contain an armature winding and a ferromagnetic base body, wherein the base body distributed over the circumference arranged axially extending grooves. These grooves may be formed in various ways in cross section and are adapted to receive electrical conductors of the armature winding. Such anchors often have an impermissibly high imbalance; they are therefore unsatisfactory in their concentricity properties.
  • the EP 0 297 278 A2 known, which relates to the rotor of a rotating machine.
  • the rotor has a multi-groove sheet metal core, windings and pairs of shoulders wound in the grooves of the sheet metal core provided on opposite surfaces of the open side of the grooves.
  • the lugs are formed by deformation of partially opened parts of the grooves of the sheet metal core to prevent slipping out of the windings.
  • Next DT 26 27 647 shows a rotor for an electric machine with teeth and grooves, tooth tips and slot slots.
  • the anchor according to the invention with the features mentioned in claim 1 is characterized in that at least one, displaced by mechanical deformation of the base body, the electrical conductor is provided for its defined positioning and / or fixing acting Nutrand Suiteselement.
  • Nutrand Systemselements By means of this Nutrand Schemeselements displaced from a mechanical deformation of the body, it is possible to align an electrical conductor received in the groove in a simple manner such that an imbalance caused by a misposition of the conductor or by an undesirable movement of the conductor in the groove during rotation of the armature is reduced or avoided.
  • the Nutrand Schemeselement urges the conductor in a defined position and / or fixed position in the interior of the groove. A fixation can be achieved, for example, by pressing the conductor from the groove edge region element to at least one groove wall and / or to the groove base.
  • the Nutrand Schemeselement web-like - the opening limiting- trained.
  • the cross section of the groove is formed slot-like and that the longitudinal axis of the slot extends in the radial direction of the armature.
  • the slot-like design of the groove it is possible that a plurality of conductors can be accommodated in the groove in such a way that the conductors are arranged substantially on the longitudinal axis and adjacent to each other. Due to the arrangement of the oblong hole in the radial direction of the armature in this embodiment, only one conductor is acted upon by the groove edge region element in order to bring the conductors accommodated in the groove into a defined position and / or fixed position.
  • the groove extends to a lateral surface of the base body or extends into the vicinity of the lateral surface and that the Nutrand Suiteselement is in the vicinity of the lateral surface.
  • the Nutrand Klaselement is integrally formed with the main body. It is also possible that the Nutrand Klaselement is formed as a separate component. An operative connection with the base body is achieved in this case by the fact that the Nutrand Schemeselement example, fitted into the groove or screwed by means of screws with the groove. Compared to this multi-piece embodiment, the one-piece design of the Nutrand Schemeselements with the body is less expensive to produce.
  • the Nutrand Schemeselement extends over the full groove length.
  • a plurality Nutrand Schemesinte are distributed over the groove length, since it is often sufficient in practice that the conductor is applied only in zones.
  • the groove has a groove bottom, two side walls and an opening and that the Nutrand Suiteselement is arranged in the region of at least one transition from a side wall to the opening.
  • the groove edge region element can be arranged on the one side wall or on the side wall of the groove opposite this in the region of the transition from the respective side wall to the opening.
  • each of the two side walls has a Nutrand Schemeselement, that is, that two Nutrand Schemes institute are provided for defined positioning and / or fixation of the conductors in the groove.
  • the clear width of the opening bounded by the Nutrand Schemeselement is smaller than the diameter or the width dimension of the conductor.
  • the opening boundary formed by Nutrand Schemeselement is thus formed such that a unwanted leakage of the conductor is avoided from the groove.
  • the opening limit of the groove also represents a deformation-favorable configuration with respect to the desired deformation.
  • the Nutrand Schemeselement bridge-like -ichich from one side wall to the other side wall extending- is formed.
  • the groove is closed in the region of the lateral surface of the body.
  • the Nutrand Schemeselement has a thickness of 0.1 mm to 0.5 mm, preferably 0.3 mm. With such a thickness, the magnetic flux can be slightly increased, for example by means of an enlargement of the base body surface caused by the groove edge area element, without the current flow between two tooth tips formed through the groove in the cross section of the base body being increased.
  • a thickness of about 0.3 mm is to be maintained in the region of the longitudinal axis of the groove, preferably over the entire Nuterstreckung.
  • the Nutrand Schemeselement is curved or substantially straight.
  • the Nutrand Schemeselement can be seen in the radial direction of the armature curved inwardly or outwardly.
  • the shape of the vault can also be varied. The curvature as well as the substantially straight shape of the Nutrand Suiteselements arise essentially from the tool used in the manufacture of the anchor.
  • the groove in cross-section is larger than the conductor to be received in the groove in order to insert the conductor into the groove can.
  • the conductor after insertion in the groove on a movement play which is caused in the anchors described in the prior art during rotation an imbalance in the anchor.
  • the groove is changed by mechanical deformation in cross section such that the conductor has no play in the groove or at least reduced in its movement play.
  • the diameter of the base body can be made smaller and to the extent that the groove is compressed in the radial direction of the base body by means of the deformation of the Nutrand Schemeselements. Due to the smaller diameter of the body, it is advantageously possible to build the entire anchor more compact and with less weight. Furthermore, the base body has a lower moment of inertia, as a result of which the armature can be operated with less wear. An arrangement of the groove projecting beyond the periphery of the base body prior to the deformation also makes it possible to lay the groove outward in the radial direction of the armature.
  • the groove can be made larger in width, which allows the use of larger diameter conductors. If the groove width remains unchanged in such a laying of the groove position, it is possible to increase the distance of the circumferentially distributed over the circumference of the body arranged grooves, so the tooth width of the body, according to the play-reducing displacement of Nutrand Schemeselements.
  • the bridge-like Nutrand Kunststoffselement before deformation has at least one notch.
  • the inventive method with the features mentioned in claim 12 is characterized in that first at least one electrical conductor is inserted into at least one arranged in a base body of the armature groove, and that then the conductor defined by mechanical deformation of a groove portion defined in the groove and / or is fixed, wherein the Nutrand Suiteselement web-like - the opening limiting - is formed. Due to the defined positioning and / or fixation of the conductor in the groove, a reproducible and precise arrangement of the conductor in the groove is possible.
  • the method according to the invention is particularly suitable for reducing or avoiding such imbalances in the armature caused by an uncontrolled position of a conductor accommodated in the groove with movement play. By means of the method, it is possible in a simple manner to variably set a deformation intensity sufficient to achieve a desired positioning and / or fixation of the conductor in the groove by adjusting the deformation force.
  • the deformation takes place in the region of the periphery of the base body. In this way, it is possible with relatively little effort to deform the groove area such that the inserted in the groove conductor is defined positioned and / or fixed.
  • a conductor retaining element is produced in the groove by the deformation.
  • this conductor retaining element it is possible to bring the conductor or conductors received in the groove into a defined position and to hold the conductors in this position during rotation of the base body.
  • the production of such a conductor retaining element is possible, in particular, if an anchor is used, the base body of which has a groove edge region element in the edge region of the groove or if the base body makes it possible to form such a groove edge region element.
  • the existing on the body conductor restraint element in a Ladder restraint position is shifted. This displacement can take place in such a way that the conductors are in touching contact with each other and / or that they come into contact with the groove bottom or on the groove walls.
  • the deformation is preferably produced by caulking by means of a pressure tool, preferably by means of at least one punch.
  • a pressure tool preferably by means of at least one punch.
  • other methods of cold forming for example embossing or pressing can be used.
  • FIG. 1 a detail area of an armature 1 is shown, which shows a main body 2 of the armature 1 with a groove 3 arranged in the base body 2 and two electrical conductors 4 received in the groove 3.
  • the groove 3 has a slot-like shape, wherein the longitudinal axis 6 of the groove 3 extends in the radial direction of the base body 2.
  • a sleeve-like insulating 5 is arranged, which conforms to the walls of the groove 3 and in which the two electrical conductors 4 are located.
  • the conductors 4 are round in cross-section in this embodiment.
  • the groove 3 extends in its longitudinal axis 6 in the radial direction of the armature 1 such that it extends into the vicinity of the lateral surface 7 of the main body 2.
  • the groove 3 by means of a Nutrand Schemeselements 8, which extends like a bridge in this embodiment of a side wall 9 to an opposite side wall 9 'of the groove 3, formed in cross-section closed.
  • the Nutrand Schemeselement 8 is integrally connected to the base body 2.
  • Position one shows the anchor 1 before deformation.
  • the two recorded in the groove 3 electrical conductors 4 have in the direction of the longitudinal axis 6 of the groove 3 to each other a movement clearance S.
  • This movement play S is required in order to be able to insert the conductors 4 into the groove 3. Therefore, the groove 3 is formed larger in cross-section than the two conductors 4.
  • This deformation of Nutrand Schemeselements 8 is a punch 12 from a starting position in the direction of Nutrand Schemeselements 8 urged in accordance with arrow 14.
  • the deformed by means of the punch 12 anchor 1 is in position two of FIG. 1 (right figure) shown.
  • the punch 12 has been pressed on the Nutrand Suiteselement 8 such that this has an inwardly curved deformation, wherein the curvature is caused by the shape of the punch 12 in the stamp area.
  • the Nutrand Kunststoffselements 8 there is a physical contact between the two electrical conductors 4, between the groove bottom 10 and this next adjacent conductor 4 and between the Nutrand Schemeselement eighth and this next adjacent conductor 4.
  • the electrical conductors 4 are thus arranged in the direction of the longitudinal axis 6 of the groove 3 movement clearance and in such a way that upon rotation of the armature 1, a fixation of the electrical conductors 4 is ensured.
  • the deformation generated by means of the punch 12 remains in place when the punch 12 is moved back to the starting position according to arrow 15.
  • FIG. 2 shows the armature 1 according to a second embodiment.
  • the groove edge region element 8 is arranged before deformation (see position one) such that it projects beyond the periphery of the base body 2.
  • the Nutrand Schemeselement 8 is formed so that the inside of the Nutrand Schemeselements 8, that is, the groove bottom 10 side facing, conforming to the contour of the next adjacent electrical conductor 4. Due to this the periphery of the body 2 superior education of Nutrand Schemeselements 8, the base body 2 is formed smaller in diameter in this embodiment than in the embodiment of FIG.
  • the groove edge region element 8 is deformed in such a way by means of the punch 12 that is just formed in the stamp region such that the groove edge region element 8 is in the deformed state (see position two) in the periphery of the base body 2.
  • the Nutrand Schemeselement 8 dominates-as in the embodiment of FIG. 2 -the periphery of the base body 2, this protruding here comes about by the fact that the position of the groove 3 is moved to the outside of the movement game S of the recorded in the groove 3 conductor 4 -in the radial direction of the base body 2.
  • the diameter of the base body 2 remains unchanged in this embodiment and corresponds to the diameter of the base body 2 of the embodiment according to FIG. 1 , Due to the displacement of the groove position radially outward, the two side walls 9, 9 'of the groove 3 are further in this embodiment, not shown here spaced apart from each other than in the FIGS. 1 to 4 illustrated embodiments.
  • FIG. 3 is a further embodiment of the armature 1 is shown, wherein like parts as in the preceding figures provided with the same reference numerals and are not explained again.
  • the Nutrand Schemeselement 8 has before the deformation (see position one) on the side facing outward to the punch 12 side a cross-sectionally V-shaped notch 16.
  • the notch 16 extends parallel to the cross section of the groove 3, wherein the tip of which extends through the longitudinal axis 6 of the groove 3.
  • the introduced in the undeformed state in cross-section V-shaped notch 16 is compressed at its legs and that extent until the notch 16 is only slightly open. Since a magnetic flux over the legs of the cross-sectionally V-shaped notch is to be avoided, the legs are not brought into abutting contact.
  • the groove 3 arranged in the main body 2 is designed to be open in the area of the lateral surface 7.
  • the fixation of the two received in the groove 3 electrical conductor 4 is carried out in this embodiment, characterized in that the two Nutrand Schemes institute 8 are deformed towards the groove base. In this case, the groove 3 remains open to the outside.
EP01964880A 2000-10-07 2001-08-03 Anker für eine elektrische maschine sowie verfahren zu dessen herstellung Expired - Lifetime EP1256160B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10049699 2000-10-07
DE10049699A DE10049699A1 (de) 2000-10-07 2000-10-07 Anker für eine elektrische Maschine sowie Verfahren zu dessen Herstellung
PCT/DE2001/002963 WO2002031948A1 (de) 2000-10-07 2001-08-03 Anker für eine elektrische maschine sowie verfahren zu dessen herstellung

Publications (2)

Publication Number Publication Date
EP1256160A1 EP1256160A1 (de) 2002-11-13
EP1256160B1 true EP1256160B1 (de) 2011-11-16

Family

ID=7658996

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01964880A Expired - Lifetime EP1256160B1 (de) 2000-10-07 2001-08-03 Anker für eine elektrische maschine sowie verfahren zu dessen herstellung

Country Status (9)

Country Link
US (1) US6847148B2 (es)
EP (1) EP1256160B1 (es)
JP (1) JP2004511200A (es)
AU (1) AU2001285699A1 (es)
BR (1) BR0107296A (es)
DE (2) DE10049699A1 (es)
MX (1) MXPA02005703A (es)
WO (1) WO2002031948A1 (es)
ZA (1) ZA200204561B (es)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10329579A1 (de) 2003-06-30 2005-03-17 Robert Bosch Gmbh Elektrische Maschine, deren Herstellverfahren und Vorrichtung zu ihrer Herstellung
DE102004032370A1 (de) 2004-06-30 2006-01-26 Robert Bosch Gmbh Elektrische Maschine und Kalibrierverfahren für einen Kommutatorläufer der elektrischen Maschine
DE102004035724A1 (de) * 2004-07-23 2006-02-16 Minebea Co., Ltd. Elektrische Maschine
TWI433838B (zh) * 2008-06-25 2014-04-11 必治妥美雅史谷比公司 作為趨化因子受體活性調節劑之六氫吡啶衍生物
US20130087532A1 (en) * 2011-10-07 2013-04-11 Ronald D. Gentry Self securing brazing preform clip
CN105811700A (zh) * 2016-03-16 2016-07-27 上海电机学院 一种异步电动机之转子槽
DE102019209257A1 (de) * 2019-06-26 2020-12-31 Zf Friedrichshafen Ag Stator für eine elektrische Maschine

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1808749A (en) * 1928-11-09 1931-06-09 Vincent G Apple Bar wound armature
JPS529805A (en) * 1975-07-11 1977-01-25 Nippon Denso Co Ltd Manufacturing method of armature for small rotary machine
DE2848618A1 (de) 1978-11-09 1980-05-22 Bosch Gmbh Robert Elektrische maschine und verfahren zu ihrer herstellung
US4757601A (en) * 1985-04-24 1988-07-19 General Motors Corporation Connection of tapered armature conductor to tapered commutator slot
JPH063979B2 (ja) * 1986-03-03 1994-01-12 株式会社日立製作所 回転機の電機子及びその製造方法
JPH0732573B2 (ja) 1987-06-03 1995-04-10 株式会社日立製作所 回転電機子の製造方法
EP0300436B1 (en) * 1987-07-20 1992-03-11 Mitsubishi Denki Kabushiki Kaisha Armature
US5864193A (en) * 1993-10-15 1999-01-26 Denso Corporation Electric rotating machine having improved insulation for an armature coil
US6137201A (en) * 1997-05-26 2000-10-24 Denso Corporation AC generator for vehicles
JPH11252832A (ja) * 1998-03-06 1999-09-17 Asmo Co Ltd コア・シート、コアおよび電機子の製造方法
JP3519983B2 (ja) * 1999-04-07 2004-04-19 マブチモーター株式会社 小型モータ及びその製造方法

Also Published As

Publication number Publication date
US20040108788A1 (en) 2004-06-10
BR0107296A (pt) 2002-08-13
AU2001285699A1 (en) 2002-04-22
US6847148B2 (en) 2005-01-25
DE10049699A1 (de) 2002-05-08
ZA200204561B (en) 2003-09-08
DE10194364D2 (de) 2003-10-02
WO2002031948A1 (de) 2002-04-18
JP2004511200A (ja) 2004-04-08
MXPA02005703A (es) 2002-12-09
EP1256160A1 (de) 2002-11-13

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